1 files changed, 191 insertions, 0 deletions
diff --git a/ksysv/kscroller.cpp b/ksysv/kscroller.cpp
new file mode 100644
index 0000000..1f69b74
--- /dev/null
+++ b/ksysv/kscroller.cpp
@@ -0,0 +1,191 @@
+// (c) 2000 Peter Putzer
+
+#include <qscrollbar.h>
+#include <qlayout.h>
+#include <qstyle.h>
+
+#include <kdebug.h>
+#include <kdialog.h>
+#include <kapplication.h>
+
+#include "kscroller.h"
+
+class KScroller::KScrollerPrivate
+{
+public:
+  KScrollerPrivate ()
+    : setCornerWidget (0L)
+  {
+  }
+
+  ~KScrollerPrivate () {}
+
+  QWidget* setCornerWidget;
+};
+
+KScroller::KScroller (QWidget* parent, const char* name)
+  : QFrame (parent, name),
+    d (new KScrollerPrivate()),
+    mVertical (new QScrollBar (QScrollBar::Vertical, this)),
+    mHorizontal (new QScrollBar (QScrollBar::Horizontal, this)),
+    mCornerWidget (new QWidget (this)),
+    mContent (0L),
+    mVerticalOld (0),
+    mHorizontalOld (0)
+{
+  mCornerWidget->hide();
+  mVertical->hide();
+  mHorizontal->hide();
+
+  connect (mVertical, SIGNAL (valueChanged (int)),
+           this, SLOT (scrollVertical (int)));
+  connect (mHorizontal, SIGNAL (valueChanged (int)),
+           this, SLOT (scrollHorizontal (int)));
+}
+
+KScroller::~KScroller ()
+{
+  delete d;
+}
+
+void KScroller::setContent (QWidget* content)
+{
+  delete mContent;
+
+  mContent = content;
+  updateScrollBars();
+}
+
+void KScroller::setCornerWidget (QWidget* corner)
+{
+  delete mCornerWidget;
+
+  mCornerWidget = d->setCornerWidget = corner;
+
+  updateScrollBars();
+}
+
+QWidget* KScroller::cornerWidget ()
+{
+  return d->setCornerWidget;
+}
+
+void KScroller::resizeEvent (QResizeEvent* e)
+{
+  QFrame::resizeEvent (e);
+ 
+  updateScrollBars();
+}
+
+QSize KScroller::minimumSizeHint() const
+{
+  QSize size = sizeHint();
+  if (size.width() > 300)
+     size.setWidth(300);
+  return size;
+}
+
+QSize KScroller::sizeHint() const
+{
+  QSize size = mContent->minimumSize();
+  int extra = kapp->style().pixelMetric( QStyle::PM_ScrollBarExtent, 0 );
+  size += QSize( extra, extra );
+  return size;
+}
+
+void KScroller::updateScrollBars ()
+{
+  int w = width();
+  int h = height();
+  QSize cs = mContent->minimumSize();
+
+  setupVertical ( cs.width(), cs.height(), w, h);
+  setupHorizontal ( cs.width(), cs.height(), w, h);
+  mContent->resize (cs);
+
+  setupCornerWidget (w, h);
+}
+
+void KScroller::setupHorizontal (int cw, int, int w, int h)
+{
+  mHorizontal->setValue (0);
+  mHorizontalOld = 0;
+
+  if (cw > w)
+    {
+      int extra = kapp->style().pixelMetric( QStyle::PM_ScrollBarExtent, 0 );
+
+      if (!mVertical->isHidden())
+        w -= extra;
+
+      mHorizontal->setRange (0, cw - w);
+      mHorizontal->setPageStep (w);
+      mHorizontal->setLineStep (25);
+      mHorizontal->setGeometry (0, h - extra, w, extra);
+
+      mHorizontal->raise();
+      mHorizontal->show();
+    }
+  else
+    {
+      mHorizontal->hide();
+    }
+}
+
+void KScroller::setupVertical (int, int ch, int w, int h)
+{
+  mVertical->setValue (0);
+  mVerticalOld = 0;
+
+  if (ch > h)
+    {
+      int extra = kapp->style().pixelMetric( QStyle::PM_ScrollBarExtent, 0 );
+      mVertical->setRange (0, ch - h);
+      mVertical->setPageStep (h);
+      mVertical->setLineStep (25);
+
+      mVertical->setGeometry (w - extra, 0, extra, h);
+
+      mVertical->raise();
+      mVertical->show();
+    }
+  else
+    {
+      mVertical->hide();
+    }
+}
+
+void KScroller::scrollVertical (int value)
+{  
+  int amount = value - mVerticalOld;
+  mVerticalOld = value;
+
+  mContent->move (mContent->x(), mContent->y() - amount);
+}
+
+void KScroller::scrollHorizontal (int value)
+{
+  int amount = value - mHorizontalOld;
+  mHorizontalOld = value;
+  
+  mContent->move (mContent->x() - amount, mContent->y());
+}
+
+void KScroller::setupCornerWidget (int w, int h)
+{
+  if (!mVertical->isHidden() && !mHorizontal->isHidden())
+    {
+      int extra = kapp->style().pixelMetric( QStyle::PM_ScrollBarExtent, 0 );
+
+      mCornerWidget->raise();
+      mCornerWidget->setGeometry (w - extra, h - extra, extra, extra);
+
+      mCornerWidget->show();
+    }
+  else
+    {
+      mCornerWidget->hide();
+    }
+}
+
+#include "kscroller.moc"